Antiskid device for vehicles



Dec, 9, 1947. M. MARTHINSEN I ANTISKID DEVICE FOR VEHICPES 2. Sheets-Sheet 1' Filed Feb. 14, 1946 Dec 9, 1947 MMARTHINSN 2,432,329.

I ANTISKID DEVICE FOR VEHICLES 2 sheets-Sheet 2 -Fi1ed Feb. 14. 194e UNITED STATES PATENT OFFICE Mads Marthinsen, Michigan City, Ind. n

Application February 14, 1946, Serial No. 647,457

1 claim. l

My invention relates to an improved device for preventing the skidding of vehicles and is particularly adapted for automobile tires.

Among the objects of my invention is to provide an improved means for attachment to tires of vehicles for preventing skidding on snow and ice, and for ready attachment and adjustment of the device for use, and such other objects, advantages, and capabilities as will later more fully y appear and wlrch are inherently possessed by my .5 is a similar view in locked position; Fig. 6 is a top plan View of a transverse member; Fig. 7 is a longitudinal view of a transverse member on top of a tire; Fig. 8 is a side elevational view of a transverse member showing the bottom of a tire;

f Fig. 9 is an end elevational View of an transverse member; and Fig. l isa detailed cross sectional view through one of the lugs.

The embodiment selected to illustrate my invention comprises a plurality of spaced transverse members I ii of narrow rectangular contour, connected by a plurality of links I I, said parts IQ and I I being made of metal or other suitable material.

Each transverse member Ii! has a substantially narrow oblong body portion I2, from the top surface oi which integrally and outwardly extend a plurality of spaced hollow lugs or projections I3. I have found it preferable to have four such lugs as this greater number provides increased enioiency in operation, particularly in combination with a narrower body portion. My narrower gripper plates I il reduce vibration in the use of my device on a car to a, minimum.

My lugs i 3 extend comparatively high above the top surface of body member I2 with the upper inner edges B of walls 5 I sharpened. The walls 5I each curve outwardly and downwardly to the edges of the under surface of the body member or to adjoining simil-ar walls forming rounded sur faces to aid in the ready expelling of ice and snow from the openings.

Each of my transverse members Iii is bent inwardly and downwardly at the opposite endsJ @t 2 the body portion I2 to form inclined portions It. In each of the inclined portions, adjacent its inner end, is a out out portion I5. The outer end of each inclined portion I4 is curved upwardly and outwardly on itself to form a holding portion I6.

p A link I I is positioned within each of saidholding portions and is connected by other links II to form sidechains spacedly holding the transverse members IE! in position.

To connect the ends of the device and adjust the same to a tire, I provide a pair of elongated links II, linked to the links I I, which are attached to one end of the two end transverse members.

To the links l I 'attached to the opposite end of the two end transverse members lil, I attach adjustment members I8 through integral rings I9.

Each adjustment member has a plurality of spaced curved notches 2B, any one of which will receive the end of elongated link Il. A retaining member 2| has one end 22 hingedly attached to one end of the adjustment member I8, a body portion 23 extending beyond the notches 29, and a hook portion 2li at its other end adapted to removably engage by friction grip the end 25 of the adjustment member.

In use my plates contact the tire and by in- @lined portions engage the sloping portions of the tire to provide desired iit and prevent slipping, The curled ends of my plates are so positioned as to space the chains away from the tire so as to prevent general contact therewith, and thus save wear and tear,

My device is particularly eiiicacious in preventing cars on which it is used from getting stuck and stalled in the deep snow. The upper inner edges 5o of walls 5I always remain sharp due to their unique construction, thereby insuring gripping power at all times.

Having thus described my invention, I claim:

In an anti-skid chain for a tire, a transverse member having a narrow oblong body portion adapted to extend entirely across the tread of the tire and having a plurality of slightly spaced integral outwardly extending projections covering a substantial portion of the area of the body portion with the outer projections positioned adjacent the outer edges of the tread of the tire, each of said projections being hollow with an open top and bottom and having rounded inner walls curving downwardly and outwardly to the open bottom, said transverse member having opposite integral outer portions downwardly and inwardly inclined to correspond with and engage lill@ Shoulders oi the tire, each of said outer por- 3 4 tions having a rectangular cut out portion of t substantial size, said outer portions curled in- UNITED STATES PATENTS Wardly on themselves at their ends to form link holding portions, said ends extending beyond and Number Name Date spaced from contact with the shoulders of the tire. 5 57 8,211 Clark Mar. 2, 1897 MADS MARTHINSEN. 909,037 Taylor et al Jan. 5, 1909 1,393,810 Moss Oct. 18, 1921 REFERENCES CITED 1,492,763 Strohl May 6, 1924 The following references are of record in the 1845924 Marthmsen Feb- 161 1932 fue of meer; 1 

